如何在Windows（ffmpeg等）中使用Java快速拍摄桌面截图？

使用内置的 Robots类比 其他Java库更容易，并且可能满足您的需求。

如果您需要一个> = 30fps的流畅视频（每秒超过30个屏幕截图），则应首先尝试使用Robots方法以及其中 的屏幕截图异步存储功能来 改善性能。

如果它对您不起作用，请尝试使用 JNA ，它几乎可以保证（即使更复杂）也可以正常进行屏幕捕获。

机器人接近

机器人课确实可以完成您想要的事情，大多数使用机器人的屏幕捕获方法都存在的问题是屏幕截图的 保存
。一种方法可能看起来像是这样：遍历captureScreen（）方法，将屏幕抓取到BufferedImage中，将其转换为字节数组，并在将图像的将来引用添加到对象之后，用异步文件编写器将其保存到目标文件。
ArrayList在存储图像数据时可以继续前进。

// Pseudo prewhile (capturing){    grab bufferedImage (screenCapture) from screen    convert bufferImage to byte array    start asynchronous file channel to write to the output file      and add the future reference (return value) to the ArrayList}

使用JNA的方法

由于只是链接是一种不好的做法，因此我将在此处发布示例：

import java.awt.Rectangle;import java.awt.image.BufferedImage;import java.awt.image.ColorModel;import java.awt.image.DataBuffer;import java.awt.image.DataBufferInt;import java.awt.image.DataBufferUShort;import java.awt.image.DirectColorModel;import java.awt.image.Raster;import java.awt.image.WritableRaster;import com.sun.jna.Native;import com.sun.jna.platform.win32.W32API;import com.sun.jna.win32.W32APIOptions;public class JNAScreenShot{    public static BufferedImage getScreenshot(Rectangle bounds)    {        W32API.HDC windowDC = GDI.GetDC(USER.GetDesktopWindow());        W32API.HBITMAP outputBitmap = GDI.CreateCompatibleBitmap(windowDC, bounds.width, bounds.height);        try        { W32API.HDC blitDC = GDI.CreateCompatibleDC(windowDC); try {     W32API.HANDLE oldBitmap = GDI.SelectObject(blitDC, outputBitmap);     try     {         GDI.BitBlt(blitDC, 0, 0, bounds.width, bounds.height, windowDC, bounds.x, bounds.y, GDI32.SRCCOPY);     }     finally     {         GDI.SelectObject(blitDC, oldBitmap);     }     GDI32.BITMAPINFO bi = new GDI32.BITMAPINFO(40);     bi.bmiHeader.biSize = 40;     boolean ok = GDI.GetDIBits(blitDC, outputBitmap, 0, bounds.height, (byte[]) null, bi, GDI32.DIB_RGB_COLORS);     if (ok)     {         GDI32.BITMAPINFOHEADER bih = bi.bmiHeader;         bih.biHeight = -Math.abs(bih.biHeight);         bi.bmiHeader.biCompression = 0;         return bufferedImageFromBitmap(blitDC, outputBitmap, bi);     }     else     {         return null;     } } finally {     GDI.DeleteObject(blitDC); }        }        finally        { GDI.DeleteObject(outputBitmap);        }    }    private static BufferedImage bufferedImageFromBitmap(GDI32.HDC blitDC, GDI32.HBITMAP outputBitmap, GDI32.BITMAPINFO bi)    {        GDI32.BITMAPINFOHEADER bih = bi.bmiHeader;        int height = Math.abs(bih.biHeight);        final ColorModel cm;        final DataBuffer buffer;        final WritableRaster raster;        int strideBits = (bih.biWidth * bih.biBitCount);        int strideBytesAligned = (((strideBits - 1) | 0x1F) + 1) >> 3;        final int strideElementsAligned;        switch (bih.biBitCount)        { case 16:     strideElementsAligned = strideBytesAligned / 2;     cm = new DirectColorModel(16, 0x7C00, 0x3E0, 0x1F);     buffer = new DataBufferUShort(strideElementsAligned * height);     raster = Raster.createPackedRaster(buffer, bih.biWidth, height, strideElementsAligned, ((DirectColorModel) cm).getMasks(), null);     break; case 32:     strideElementsAligned = strideBytesAligned / 4;     cm = new DirectColorModel(32, 0xFF0000, 0xFF00, 0xFF);     buffer = new DataBufferInt(strideElementsAligned * height);     raster = Raster.createPackedRaster(buffer, bih.biWidth, height, strideElementsAligned, ((DirectColorModel) cm).getMasks(), null);     break; default:     throw new IllegalArgumentException("Unsupported bit count: " + bih.biBitCount);        }        final boolean ok;        switch (buffer.getDataType())        { case DataBuffer.TYPE_INT: {     int[] pixels = ((DataBufferInt) buffer).getData();     ok = GDI.GetDIBits(blitDC, outputBitmap, 0, raster.getHeight(), pixels, bi, 0); }     break; case DataBuffer.TYPE_USHORT: {     short[] pixels = ((DataBufferUShort) buffer).getData();     ok = GDI.GetDIBits(blitDC, outputBitmap, 0, raster.getHeight(), pixels, bi, 0); }     break; default:     throw new AssertionError("Unexpected buffer element type: " + buffer.getDataType());        }        if (ok)        { return new BufferedImage(cm, raster, false, null);        }        else        { return null;        }    }    private static final User32 USER = User32.INSTANCE;    private static final GDI32 GDI = GDI32.INSTANCE;}interface GDI32 extends com.sun.jna.platform.win32.GDI32{    GDI32 INSTANCE = (GDI32) Native.loadLibrary(GDI32.class);    boolean BitBlt(HDC hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, HDC hdcSrc, int nXSrc, int nYSrc, int dwRop);    HDC GetDC(HWND hWnd);    boolean GetDIBits(HDC dc, HBITMAP bmp, int startScan, int scanLines, byte[] pixels, BITMAPINFO bi, int usage);    boolean GetDIBits(HDC dc, HBITMAP bmp, int startScan, int scanLines, short[] pixels, BITMAPINFO bi, int usage);    boolean GetDIBits(HDC dc, HBITMAP bmp, int startScan, int scanLines, int[] pixels, BITMAPINFO bi, int usage);    int SRCCOPY = 0xCC0020;}interface User32 extends com.sun.jna.platform.win32.User32{    User32 INSTANCE = (User32) Native.loadLibrary(User32.class, W32APIOptions.UNICODE_OPTIONS);    HWND GetDesktopWindow();}

也可以看看

• http://www.thepcwizard.in/2012/12/java-screen-capturing-tutorial.html

• 如何将截屏开发为视频应用程序

• http://www.javalobby.org/forums/thread.jspa?threadID=16400&tstart=0

• http://hiddensciencex.blogspot.co.at/2014/01/fast-screen-capture-in-java-example.html

• http://www.preranch.com/t/340180/GUI/java/ficient-screenshot-Java

• http://www.javaworld.com/article/2071755/learn-java/capture-the-screen.html